Thanks for all the comments everyone.

Layout & theme: The points about colors and contrast are noted. I'll look for a different theme later this week.

Articles: As noted on the front page, there will be a new system soon (dont know yet how soon). It will most likely be wiki-based.

Smileys: I've added a bunch of new ones to replace the odd smf versions.

Private messages: I'm not sure if its possible to change the way this works. Maybe through a add on or something. I'll try and see if I can find something about that.

Attachements: attachements are enabled. Use the Additional Options link under the textarea to get more options.